I have a 4 to 5 year old girl who is not her spunky self. She is very thin i cant stress enough how thin she is and low energy. I have been giving her nutrition drench last two days and notice she does eat meal worms and crickets when I give em. Haven't seen her drink water but assume she would not go 2 days without so must be. No lice or mites. Pale comb. Not laying eggs since winter started but none of my chickens are. She had been keeping her neck drawn in. Not fighting me when I handle her. She is the most spunkey and usually I would have to chase her. Attached are pics from today's poop, vent which I cleaned up, and pics with her sisters a few days ago before I seperated....in addition I thinking maybe worms but can't tell. Pic of dewormer I got as no local places carrying anything for chickens. Any advice on what could be wrong. When to put her back with the flock (has been staying inside house bathroom) cold outside do i give her a few more days to respond to dewormer and build strength? Any advise would be appreciated.